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You can change many home screen settings, such as the background image.
1. Find "Display"
Slide your finger downwards starting from the top of the screen.
2. Select background image
Press Select Home Screen Wallpaper.
Press the folder icon.
Press the menu icon.
Press the required picture.
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.